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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "components/variations/variations_params_manager.h" |
| 6 |
| 7 #include <utility> |
| 8 |
| 9 #include "base/feature_list.h" |
| 10 #include "base/metrics/field_trial.h" |
| 11 #include "base/test/scoped_feature_list.h" |
| 12 #include "components/variations/variations_associated_data.h" |
| 13 |
| 14 namespace variations { |
| 15 namespace testing { |
| 16 |
| 17 namespace { |
| 18 |
| 19 // The fixed testing group created in the provided trail when setting up params. |
| 20 const char kGroupTesting[] = "Testing"; |
| 21 |
| 22 base::FieldTrial* CreateFieldTrialWithParams( |
| 23 const std::string& trial_name, |
| 24 const std::map<std::string, std::string>& param_values) { |
| 25 variations::AssociateVariationParams(trial_name, kGroupTesting, param_values); |
| 26 return base::FieldTrialList::CreateFieldTrial(trial_name, kGroupTesting); |
| 27 } |
| 28 |
| 29 } // namespace |
| 30 |
| 31 VariationParamsManager::VariationParamsManager() |
| 32 : field_trial_list_(new base::FieldTrialList(nullptr)), |
| 33 scoped_feature_list_(new base::test::ScopedFeatureList()) {} |
| 34 |
| 35 VariationParamsManager::VariationParamsManager( |
| 36 const std::string& trial_name, |
| 37 const std::map<std::string, std::string>& param_values) |
| 38 : VariationParamsManager() { |
| 39 SetVariationParams(trial_name, param_values); |
| 40 } |
| 41 |
| 42 VariationParamsManager::VariationParamsManager( |
| 43 const std::string& trial_name, |
| 44 const std::map<std::string, std::string>& param_values, |
| 45 const std::set<std::string>& associated_features) |
| 46 : VariationParamsManager() { |
| 47 SetVariationParamsWithFeatureAssociations(trial_name, param_values, |
| 48 associated_features); |
| 49 } |
| 50 |
| 51 VariationParamsManager::~VariationParamsManager() { |
| 52 ClearAllVariationIDs(); |
| 53 ClearAllVariationParams(); |
| 54 } |
| 55 |
| 56 void VariationParamsManager::SetVariationParams( |
| 57 const std::string& trial_name, |
| 58 const std::map<std::string, std::string>& param_values) { |
| 59 CreateFieldTrialWithParams(trial_name, param_values); |
| 60 } |
| 61 |
| 62 void VariationParamsManager::SetVariationParamsWithFeatureAssociations( |
| 63 const std::string& trial_name, |
| 64 const std::map<std::string, std::string>& param_values, |
| 65 const std::set<std::string>& associated_features) { |
| 66 base::FieldTrial* field_trial = |
| 67 CreateFieldTrialWithParams(trial_name, param_values); |
| 68 |
| 69 std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); |
| 70 for (const std::string& feature_name : associated_features) { |
| 71 feature_list->RegisterFieldTrialOverride( |
| 72 feature_name, |
| 73 base::FeatureList::OverrideState::OVERRIDE_ENABLE_FEATURE, |
| 74 field_trial); |
| 75 } |
| 76 |
| 77 scoped_feature_list_->InitWithFeatureList(std::move(feature_list)); |
| 78 } |
| 79 |
| 80 void VariationParamsManager::ClearAllVariationIDs() { |
| 81 variations::testing::ClearAllVariationIDs(); |
| 82 } |
| 83 |
| 84 void VariationParamsManager::ClearAllVariationParams() { |
| 85 variations::testing::ClearAllVariationParams(); |
| 86 // When the scoped feature list is destroyed, it puts back the original |
| 87 // feature list that was there when InitWithFeatureList() was called. |
| 88 scoped_feature_list_.reset(new base::test::ScopedFeatureList()); |
| 89 } |
| 90 |
| 91 } // namespace testing |
| 92 } // namespace variations |
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